Improvement in rotary puddling-furnaces



J'. I. WILLIAMS.

ROTARY PUDDLING FURNACE. No.188,488 vPaKLenLe'd March 20,1877.

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JOHN I. WILLIAMS, OF MILLVALE, PENNSYLVANIA.l

IMPROVEVIENT IN ROTARY PUDDLlNG-FURNACES.

Specification forming part of Letters Patent No. 188,48, dated March 20, 1877 application tiled January 8, 1877.

To all whom it may concern Be it knownv that I, JOHN I. WILLIAMS, of Millvale borough, county of Allegheny, State of Pennsylvania, have invented or discovered a new and useful Improvement in Rotary Puddling-Furnaces; and l do hereby declare the following` to be a full, clear, concise, and exact description thereof, reference being had ,to the accompanying drawing, making a part of this specification, in,whichlike letters indicating like parts Figure l, Sheet l, is a perspective view of my improved furnace. Fig. 2, 'Sheet 2, shows and, for convenience, I have illustrated the same, in connection with such a furnace. The rotating working-chamber is represented at A. It is supported and rotated on friction-rollers R, and is driven by suitable power communicated through shaft R1 and pinion R2 to the rack B3.

-The usual lining or fettling is represented at A1. The neck N communicates with the stack S. These parts, as well as the furnace proper or fire-chamber U C1 are, except as hereinafter explained, of the usual or any desired construction. The tire-bridge of the furnace is shown at C?. The bridge-opening that leads from the rechamber is surrounded by a collar or ring, b, which projects a little from or beyond the face of the end wall C1. This ring has heretofore been tixedly secured in place, so that when it burnt out or wore out, or became broken, the end wall of the furnace and the fire-bridge O2 had to be torn down and rebuilt in the removal and renewal of the ring. To avoid this necessity, I make the ring b removable, by means of any suitable exterior fastening at or about its lower edge, and any convenient detachable fastening at or aboutits upper edge. As shown in the drawing, a curved cleat, b1, rabbeted along its inner upper side, is permanently secured in proper position for the ring b to rest thereon, and a rib, b2, on the lower edge of the ring b, enters 'the rabbet. On the upper side ofthe ring are and among others is the fact that the rings b c, working closely against each other, wear away rapidly, and it is then impracticable to move either the furnace or working-chamber so as to close up the joint. To remedy this and other evils, I arrange the furnace G and working-chamber A in such relative position that a curved, crooked, or angular removable ilue or flue-section B can be made to connect` the fire-chamber with the mouth A2 of the I working chamber. rlhis iiue section is, by suitable sliding rails B1, mounted on ways B2, or by other equivalent devices of like function, made removable, for convenience in making repairs, and also adjustable, so that as the rings b c, one or both, wear away, it may be slid forward, and thereby close up the joint caused by such wearing. Any suitablebraceor. support placed against its outer curved side may Abe employed to hold it in place.

Instead of the ways B2, the line-section B may be suspended from an overhanging track or rail by a wheel or truck running thereon, as is common in rolling-mills, and such overhanging track o'r rails, with suitable means of suspension and movability, I include herein as the mechanical equivalents of the slides and the case. l have hence made the opposite or right-hand end of the case, as represented by the annular plates a a', with an inner face sloping at a considerable angle to the cylindrical part. of the shell-say, about one hundred and fifty degrees, more.or less-so that the fettling as it expands, instead of exerting its expansive force to rupture the case7 will slide along the slope of such end and extend over the inner face ofthe end ring a, so as, also, to protect it against the destructive action of the heat, "which passes over into the neck N; and as a further security to the case, I connect the sloping end ring al to the cylindrical part of the case by a T-ring, ai", arranged and combined substantially as shown, so as to get three lines of riveting, e el e2, at the angle of the cylindrical and end parts of the case. By t-his means the durability of the case is largely increased. 1

As a further means of preserving the ring a from the destructive eects of the heat, I play a jet of water onto its upper face, as it revolves, by the use of any suitable pipe, p. And partly to convert the outer face of this ring into a kind of annular trough, I encom pass it at the extreme outer end of its `slope with a band, t', which has the effect to pre vent the escape of the Water in that direction, and so cause it to run down the sides of the ring et, with the result of comparatively low temperature in such ring. The neck, which leads from the working-chamber A to the stack S, consists of a drum, N, of the forni of the frustum of a cone, made of a cast or sheet iron shell, lined with rebrick, anda rising ue. N', leading' from the side of N to the stack S, and in like manner composed of a cast 0r sheet iron shell lined with tire-brick. These shells, as heretofore made, could be lined only from the inside, and great trouble has been experienced from the diifleulty of keying or properly supporting the top or roof part of the lining.

This difficulty I have overcome by casting the shells each with an opening, 'n n', respec't ively, on its upper side, sufficiently large to enable the lire-brick linings a: .r' to be keyed .from the outside after the linings have been properly built up Within. In this Way the shells can be lined. so that the linings will be as durable as is usual in similar structures uur der like conditions of use.

The liningof the stacks of such furnaces is apt to melt and become disintegrated and fall down. If such matter be allowed to accumulate it will fill up the base of the stack and run down the neck N N into the working-chamber. `To prevent this I arrange a Water-box, P, at the base of the stack, to receive such detritus, and provide a door, P', for its removal. I have also found that this door answers the purpose of the usual damper at the top of the stack, for regulating the draft. For most purposes the draft can be regulated snihciently by opening and closing this door, without resorting to the use `of the damper.

rIhe water in the box P also has the effect of l. The tire-chamber and rotary Working chamber, an gularly arranged to each other, in

combination with an adjustable intermediateW due-section, substantially as set forth.` y

2. The combination, with fire-chamber and rotary Working-chamber, of the intermediate removable `nue-section, substantially as set forth.

3. The rotating Working-chamber A, having the usual angular slope in its shell at the fireinlet end, and end rings a al at its outlet` end, at an increased angle relatively thereto, substantially as and for the purposes set forth.`

4. The T-ring a?, in combination withthe Y cylindrical part of the easing, and `with the end ring al, substantially as set forth.

' 5. A brickliued castfiron ilue-case, having an opening in the case through which to key the arch or top-of the' brick-Work, substan i tiallyas set forth.

ln testimony whereof I have hereunto` set my hand.

JOHN L WinLIAMs.

Witnesses: l

JAMES M. CHRISTY, y GEORGE H. Guars'ry. y 

